SLO¶
Guance SLO monitoring revolves around various metrics, testing whether the availability of system services meets target requirements.
Concepts¶
| Term | Description |
|---|---|
| SLA | Service-Level Agreement, a commitment from the service provider (Provider) to the customer (Customer). You can score the service provider's SLA quality and monitor the compliance rate in real-time. |
| SLI | Service Level Indicator, measurement metrics, referring to the indicators selected to measure system stability. Guance SLI supports setting one or more measurement metrics based on monitors. |
| SLO | Service Level Objective, the smallest unit for SLA scoring processing in Guance. It is the target for the cumulative number of SLI successes within a time window. We often convert SLO into an error budget, used to calculate the tolerable number of errors. The time during which abnormal events occur within each detection cycle will be deducted from the allowable fault tolerance duration. |
As shown in the figure above, the system detects anomalies every 5 minutes. The coverage time for each abnormal event is precisely calculated based on its actual start and end points (the start time point is based on the detection time window, and the end time point is composed of the event's start time + duration). The deduction amount is the total coverage time after merging all abnormal events (overlapping periods are counted only once).